OpenMx General Help

Posted on
Picture of user. mspiegel Joined: 07/31/2009

Staying informed with OpenMx

The easiest way to keep up with the latest changes to the OpenMx software is to subscribe to receive email notification of any news updates. Assuming that you are logged in, click on the "My account" link on the left-hand panel of your screen. Next click on "Subscriptions" and then "Content types". Enable the checkbox for "News" and click on "Save". Once you have followed these steps, you will start receiving an email whenever something is posted under the "Recent News" section of the website (the top left panel, underneath the Guinea Pig).

Posted on
Picture of user. Steve Joined: 07/30/2009

Welcome to the OpenMx General Help Forum

This forum is designed for general questions about how to use OpenMx. If you can't find another place where your question fits, then this is the place to be!

Posted on
No user picture. j.o. Joined: 02/27/2026

How To Calculate Composite Reliability (McDonald's Omega) for CFA Models

I have fitted a one-factor model with ordinal and continuous indicators. I would like to compute McDonald's Omega for this model, analogous to what semTools::compRelSEM() can do for lavaan models. 

As far as I could tell, there is no ready OpenMx function that can do this. I have attempted to write my own function, but am unsure if my implementation is correct. In particular, I am struggling with the standardisation of factor loadings and residual variances, and whether the presence of ordinal indicators complicates things.

Posted on
No user picture. cffalk2 Joined: 10/06/2025

item factor analysis performance issues across R versions

I'll try to describe the problem briefly. Can try to provide reprex if this sounds novel.

Posted on
No user picture. vadim Joined: 08/03/2024
Posted on
No user picture. loveyu3317 Joined: 07/25/2024

five-factor model

Hi,

I'm using OpenMx to run a five-factor CFA model for 14 variables. "phenfile0" is the dataset and I used its 3rd to 16th columns as a input with the colnames of "y1" to "y14".
"y12" "y13" "y14" belong to "F1"; "y9" "y10" "y11" belong to "F2"; "y6" "y7" "y8" belong to F3; "y3" "y4" "y5" belong to F4; and "y1" "y2" belong to F5.
**Issue**: the output gave a larger SE for some loadings. I'm not sure if the code is correct. Thanks for your help!

Posted on
No user picture. krzysiek Joined: 09/05/2013

how to compare two correlation matrices

Hi,
I'm trying to compare two correlation matrices from a study of two different samples of people from different cultures. These matrices aren't symmetrical because they represent the correlations of two different sets of psychological tests. Is there a way to do this in OpenMx?
Thanks in advance for your help.
Krzysztof

Posted on
No user picture. didenursahin Joined: 03/20/2023

Variance model graph

Hey,
Does anyone have a graph template for the bivariate variance estimate model?
Best,
Didi